/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file    stm32f1xx_hal_timebase_TIM.c
  * @brief   HAL time base based on the hardware TIM.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2020 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */
/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/
#include "stm32f1xx_hal.h"
#include "stm32f1xx_hal_tim.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
TIM_HandleTypeDef        htim4;
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

/**
  * @brief  This function configures the TIM4 as a time base source.
  *         The time source is configured  to have 1ms time base with a dedicated
  *         Tick interrupt priority.
  * @note   This function is called  automatically at the beginning of program after
  *         reset by HAL_Init() or at any time when clock is configured, by HAL_RCC_ClockConfig().
  * @param  TickPriority: Tick interrupt priority.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority)
{
    RCC_ClkInitTypeDef    clkconfig;
    uint32_t              uwTimclock = 0;
    uint32_t              uwPrescalerValue = 0;
    uint32_t              pFLatency;
    /*Configure the TIM4 IRQ priority */
    HAL_NVIC_SetPriority(TIM4_IRQn, TickPriority,0);

    /* Enable the TIM4 global Interrupt */
    HAL_NVIC_EnableIRQ(TIM4_IRQn);
    /* Enable TIM4 clock */
    __HAL_RCC_TIM4_CLK_ENABLE();

    /* Get clock configuration */
    HAL_RCC_GetClockConfig(&clkconfig, &pFLatency);

    /* Compute TIM4 clock */
    uwTimclock = 2*HAL_RCC_GetPCLK1Freq();

    /* Compute the prescaler value to have TIM4 counter clock equal to 1MHz */
    uwPrescalerValue = (uint32_t) ((uwTimclock / 1000000) - 1);

    /* Initialize TIM4 */
    htim4.Instance = TIM4;

    /* Initialize TIMx peripheral as follow:
    + Period = [(TIM4CLK/1000) - 1]. to have a (1/1000) s time base.
    + Prescaler = (uwTimclock/1000000 - 1) to have a 1MHz counter clock.
    + ClockDivision = 0
    + Counter direction = Up
    */
    htim4.Init.Period = (1000000 / 1000) - 1;
    htim4.Init.Prescaler = uwPrescalerValue;
    htim4.Init.ClockDivision = 0;
    htim4.Init.CounterMode = TIM_COUNTERMODE_UP;
    if(HAL_TIM_Base_Init(&htim4) == HAL_OK)
    {
        /* Start the TIM time Base generation in interrupt mode */
        return HAL_TIM_Base_Start_IT(&htim4);
    }

    /* Return function status */
    return HAL_ERROR;
}

/**
  * @brief  Suspend Tick increment.
  * @note   Disable the tick increment by disabling TIM4 update interrupt.
  * @param  None
  * @retval None
  */
void HAL_SuspendTick(void)
{
    /* Disable TIM4 update Interrupt */
    __HAL_TIM_DISABLE_IT(&htim4, TIM_IT_UPDATE);
}

/**
  * @brief  Resume Tick increment.
  * @note   Enable the tick increment by Enabling TIM4 update interrupt.
  * @param  None
  * @retval None
  */
void HAL_ResumeTick(void)
{
    /* Enable TIM4 Update interrupt */
    __HAL_TIM_ENABLE_IT(&htim4, TIM_IT_UPDATE);
}

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
